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Senior Test Engineer - HIL

ON.energy
USAfull_timePosted 11 Sept 2026

About the role

<div class="content-intro"><p>ON.energy<span class="Apple-converted-space">&nbsp;</span>is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center.&nbsp;With multiple gigawatts currently under construction, we are enabling grid-safe data centers.&nbsp;</p></div><h3>Role Summary</h3> <p>The HIL Test Engineer develops and operates hardware-in-the-loop and real-time simulation capability for ON.energy storage and power conversion products. The role covers real-time model development, integration of controllers and firmware with the simulation environment, execution of structured test campaigns, and the reporting that supports design reviews and product release.&nbsp;This is a hands-on laboratory and integration role, working closely with the controls, firmware, modeling, and product engineering teams.</p> <p>&nbsp;</p> <h3>Key Responsibilities</h3> <ul> <li>Develop and maintain real-time models of plant, grid, and equipment behavior for use in controller testing.</li> <li>Configure and operate the HIL environment, including real-time simulator, I/O interfaces, signal conditioning, and data acquisition.</li> <li>Integrate product controllers, control software, and firmware builds with the simulation environment, and maintain those configurations under version control.</li> <li>Integrate supplier-provided equipment models and develop equivalent models where required.</li> <li>Plan and execute functional, performance, fault, boundary-condition, and regression test campaigns against defined acceptance criteria.</li> <li>Verify control performance across normal operation, disturbances, abnormal conditions, and recovery.</li> <li>Compare test results against offline simulation studies and laboratory measurements, and resolve discrepancies.</li> <li>Develop scripts and tooling to automate test execution, data processing, and reporting.</li> <li>Investigate failures with controls and firmware engineers, support root-cause analysis, and re-test to closure.</li> <li>Prepare test reports documenting method, configuration, results, limitations, and recommendations.</li> <li>Maintain laboratory safety, equipment, configuration records, and documentation.</li> </ul> <p>&nbsp;</p> <h3>Key Requirements</h3> <ul> <li>Four or more years in HIL testing, real-time simulation, controls validation, or laboratory testing of grid-connected power electronics.</li> <li>Bachelor's degree or higher in electrical engineering, power systems, controls engineering, or a related discipline.</li> <li>Direct ex

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ON.energy

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